Display: Fix debug statements

Call dprintf instead of printf

Change-Id: If64559fefff83e338b1f12399403f311579320ce
diff --git a/target/msm7627a/target_display.c b/target/msm7627a/target_display.c
index 157b91b..d69ed68 100644
--- a/target/msm7627a/target_display.c
+++ b/target/msm7627a/target_display.c
@@ -103,7 +103,7 @@
 	};
 
 	if (msm_display_init(&panel)) {
-		printf(CRITICAL, "Display init failed!\n");
+		dprintf(CRITICAL, "Display init failed!\n");
 		return;
 	}
 	display_enabled = 1;